COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

In a centrifugal compressor, the flow of air is ________ to the axis of compressor.

None of these

Perpendicular

Parallel

Inclined

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The velocity of air entering in a rocket is ___ as compared to an aircraft.

Zero

More

Less

Same

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Gas turbine works on

Brayton or Atkinson cycle

Ericsson cycle

Rankine cycle

Carnot cycle

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Inter cooling in compressors

Results in saving of power in compressing a given volume to given pressure

Enables compression in two stages

Is the standard practice for big compressors

Cools the delivered air

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Pick up the correct statement

Gas turbines use both air and liquid cooling

Large gas turbines use radial inflow turbines

Gas turbine's blade will appear as impulse section at the hub and as a reaction section at tip

Gas turbines have their blades similar to steam turbine

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The work-done on a compressor will be minimum if air is taken from

A source of high temperature air

A source of low temperature air

The atmosphere

A source at 0° C

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In a double acting compressor, the air is compressed

In two cylinders on both sides of the piston

In one cylinder

In two cylinders

In a single cylinder on both sides of the piston

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Free air is the air at

20°C and 1 kg/cm² and relative humidity of 36%

0°C and standard atmospheric conditions

15°C and 1 kg/cm²

Atmospheric conditions at any specific location

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In a jet propulsion

None of these

The propulsive matter is caused to flow around the propelled body

Its functioning does not depend upon presence of air

The propulsive matter is ejected from within the propelled body

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In jet propulsion power unit, the inlet duct of diverging shape is used in order to

Beautify the shape

Convert kinetic energy of air into pressure energy

Collect more air

Provide robust structure

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